Doc: Made it clearer that QProcess::start() only starts a new process if one is not already running.
Doc: Made it clearer that QProcess::start() only starts a new process if one is not already running.

Task-number: 231513
Reviewed-by: TrustMe

RLovelett/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,KDE/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,radekp/qt,igor-sfdc/qt-wk,radekp/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,RLovelett/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,KDE/qt,pruiz/wkhtmltopdf-qt,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,KDE/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,radekp/qt,pruiz/wkhtmltopdf-qt,radekp/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,KDE/qt,radekp/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,radekp/qt,pruiz/wkhtmltopdf-qt,KDE/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,KDE/qt,RLovelett/qt,radekp/qt,radekp/qt,RLovelett/qt,KDE/qt,radekp/qt,RLovelett/qt,igor-sfdc/qt-wk,radekp/qt,igor-sfdc/qt-wk